June 4, 2012: Caroline Wozniacki, one of the world's top ranked women's tennis players and gossip column fodder for her personal life with boyfriend Rory McIlroy, the No. 1 ranked men's golfer in the world, is about to let her personal life become much more public.

The 21-year-old blonde this September will launch The Caroline Wozniacki Underwear collection in collaboration with JBS Underwear. The debut line will consist of low hipsters, g-strings, bras and tops and was described by Wozniacki as “A feminine lifestyle/leisure underwear collection for the girl that wants the good looks from fashion, a perfect fit for her body, and a quality that’s hard to beat."

Wozniacki will be featured in supporting marketing, which initially will include print and online ads. The creative will come with the tag line, “This is Me.”

The native of Denmark was the world's No. 1 ranked women's tennis player for 67 consecutive weeks until earlier this year. She entered the French Open ranked No. 9 in the world, but could drop after losing in the third round this past weekend.

The partnership was handled by John Tobias, Wozniacki's agent and president of sport marketing firm Lagardère Unlimited’s tennis division, along with Lagardère's director of talent marketing, Drew LeMesurier.

“We are extremely excited about the collaboration between Caroline and JBS," Tobias said in a statement. "When Caroline attaches her name to something she does so with great consideration. This is a partnership that will hopefully live well beyond Caroline’s tennis career.”

Underwear deals in sports are not uncommon. Michael Jordan has a deal with Hanes and Tim Tebow is a marketing spokesman for Jockey. Female athletes such as Venus and Serena Williams have designed their own lines of active wear and sports undergarments.

The Caroline Wozniacki Underwear collection will be available online and at select retailers worldwide.